There's having a spine and there's just being bloody minded, though. I can't see what good the troops are doing. If we don't leave, it can only be on the basis that we broke it so we have to try to mend it. Though god knows how

Unlike the Americans , the British troops can be bought before the British courts , the european courts and the ICC , if their is any validity in the charges levelled by the Iraqis .
This is of course an argument in favour of going and getting them back from the hands of the iraqi authorities, oh no, they weren't in the hands of the authorities were they, they had been handed over to the militia. Anyway, there is in theory no question the troops will not escape justice if they had in fact done wrong.

Exactly. Last I looked, if you go somewhere, you are subject to those laws
I only know about the UK and the old FDR but there were visiting forces agreements in those cases. I would expect that is common if not universal for any country stationing large numbers of troops abroad.